CVE-2024-21870: A file write vulnerability exists in the OAS Engine Tags Configuration functionality of Open Automation Softwa

Routine

MEDIUM 4.9DOWNGRADE

CVE-2024-21870 is a medium-severity flaw (CVSS 4.9) affecting open automation software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A file write vulnerability exists in the OAS Engine Tags Configuration functionality of Open Automation Software OAS Platform V19.00.0057. A specially crafted series of network requests can lead to arbitrary file creation or overwrite. An attacker can send a sequence of requests to trigger this vulnerability.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-73
Published	2024-04-03
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: openautomationsoftware

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-04-03 14:15 UTCPublished CVE record published
2026-06-17 07:10 UTCUpdated Record last modified

openautomationsoftware open automation software DOWNGRADE

Affected: 19.0.0.57

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.0.0.57

1. Check installed version

apt-cache policy open-automation-software || rpm -q open-automation-software || open-automation-software --version

2. No fixed release: DOWNGRADE to a release before 19.0.0.57 (Debian / Ubuntu)

apt-cache madison open-automation-software sudo apt install open-automation-software=<VERSION_BEFORE_19.0.0.57> sudo apt-mark hold open-automation-software

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list open-automation-software sudo dnf downgrade open-automation-software-<VERSION_BEFORE_19.0.0.57> sudo dnf versionlock add open-automation-software

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-21870?

open automation software: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-21870 being exploited?

CVE-2024-21870 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-21870 affect?

CVE-2024-21870 affects open automation software. Severity is medium (CVSS 4.9). A file write vulnerability exists in the OAS Engine Tags Configuration functionality of Open Automation Software OAS Platform V19.00.0057. A specially crafted series of network requests can lead to arbitrary file creation or overwrite. An a

How urgent is CVE-2024-21870?

Priority 35/100. Public exploit reference

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References

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